<p>Rock Quality Designation (RQD), was introduced by Don Deere in the mid-1960s as a means of using diamond core to classify rock for engineering purposes. Subsequently it was incorporated into the Rock Mass Rating and Q-system classification methods which, ...

It is inappropriate, if not meaningless, to attempt to apply limit state design methods, such as those encapsulated in Eurocode 7, to the design of primary support for tunnels in rock, particularly weak rock or any rock under high stress. By reference to some ...

This paper presents case studies for both rock mass modulus and rock mass shear strength in an attempt to assess the validity of the approach of using GSI and the Hoek-Brown criterion. It is concluded that for some rock masses the method works well, but in ...

This paper questions the application of rock mass classification systems in engineering geology problems.

This paper presents the view that rock mass classification systems are not enough for final design, from experience with major tunnels and cavern projects in the Sydney region.

This paper presents the rock mass parameters of Hawkesbury Sandstone

Details are given of the analytical methods used to design rockbolts and shotcrete support for tunnels and large span caverns under relatively low cover in the near horizontally bedded Triassic sandstones of the Sydney region.

This paper deals with a quick clay landslide at the area of Siak River in Sumatra .

Permanent rock bolts in civil engineering are taken with a design life of at least 50 years. A review of recent Australian tunneling projects shows that substantial differences exist in the level of corrosion protection provided for permanent steel shafted ...

Design methods for axial and lateral loads on rock socketed piles are summarized. The key factors which influence design for axial loading are presented and detailed descriptions are given of three appropriate design methods, together with worked examples. ...